Telephone system for railway-trains.



E. H. BOUDWIN.

TELEPHONE SYSTEM FOR RAILWAY TRAINS.

APPLICATIbN FILED NOV- 27| l9ll.

Patented July 27, 1915.

3 SHEETS-SHEET I.

I WITNESS E. H. BOUDWIN.

TELEPHONE SYSTEM FOR RAILWAY TRAINS. APPLICATION FILED NOV. 27. T91].

1,148, 1 41 Patented July 27, 1915.

3 SHEETS-SHEET 2.

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v r: 1N VENT OR WITNESSES COLUMBIA PLANOQRAPH C0,,WASHINGTON. D. C.

E. H. BOUDWIN.

TELEPHONE SYSTEM FOR RAILWAY TRAINS.

APPLICATION FILED Nov.27. 19H.

1,148,1 41 Patented July 27, 1915.

3 SHEETS-SHEET 3.

v WITNESSES INVENTOR DLUMBIA PLANOGRAI'N c0..\vA5lilN0'raN n c sir m.

EDWARD HARGLD BOUDWIN, 0F PHILADELPHIA, FENNSYLVANIA, OF ONE- SIX'IH TQDAIIIEL W. HARNER, ONE-SIXTH TO ROBERT Il- VIORSING, ONE-SIXTH TO CARL M. GAGE, AND ONE-SIXTH TO JAMES A. PFOUTS, ALL OF PHILADELPHIA, PENNSYLVANIA, A111) ONE-SIXTH. TO 'AIVIBROSE E. JOHN, 016 HUNTINGDON, PENN- SYLVANIA.

TELEFI-IONE SYSTEM FOR RAILWAY-TRAIN S.

Specification of Letters Patent.

Patented July 27, 1915.

To all whom it may concern:

Be it lmown that I, EDWARD HAROLD BoUnwIN,-a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Telephone Systems for Rallway-Trains, of which the following is a specification.

My said invention consists in variousnnprovementsin the details of construction and arrangement of parts of a telephone system for use on railway trains whereby articulate speech may betransmitted between the locomotive driver. and any other member of the train crew on any car, or other part of the train, all as will be hereinafter more fully described and claimed. V

. Referring to the accompanying drawings which are made apart hereof and on which similar reference'characters indicate similar parts: Figure 1 is a diagrammatic View of a portion of a railway train illustrating the application of my said invention thereto, Fig. 2, a similar view on an enlarged scale of a fragment the ends of two railway cars illustrating the means of establishingelectrical connection from one to the other and forming a part of my said system, Fig. 3, a

side elevation of an, angle cock. of a form such as is in common use as a part of the air brake equipment, on railway trains but 1 1 of'hose between the cars, Fig.8, a cross section on .theldotted line 9-9 in-Fig. 8, Fig. 10, a cross section through the hose, as on the dotted line 10 10 in Fig.2, and Figs. 11 and 12, detail views illustrating the electrical contacts between the parts of the hose coupling on an enlarged scale. I

In said drawings the portions marked A represent the angle cook; 13 B? the two parts of the hose coupling; C, the hose nipple, and D, the pipe tap.

The angle cock A, as shown in Fig. 3, is of the same general form as the angle cocks.'

in common use, except that it is recessed on opposite sides of its interior and contact plates 10, 11, 12 and Bare mounted in said recesses, being embedded in insulating macuit wires may be connected as will be presently described. In lieu of this form of angle cook the tap D. shown in Figs. 5 and 6 may be substituted to establish the electrical connection with the common angle cock without any change in its structure,

as. will be readily understood by an inspec mounted in the bearing face of lip Z) of part B and corresponding contact plates 21 and Like contact plates are mounted in the lip bof partB and corresponding contact plates are mounted in the co-acting lip 5 of part B One of'said contact plates, 23, of'part B, and one, 25, of part B? are shown in Fig. 7, but the other pair are not shown, the arrangement being a duplication of that shown in Figs. 11 and 12. Said several contact plates are each insulated from the respective parts of the couplings, as shown, and when the parts are. coupled, as shown in Fig. 2, the co-acting contact plates of the respective parts bear against each other and establish an electrical connection.

terial l-ft, and connected with binding posts 15,16, 17 and 18, respectively, to which cirv22 are mounted in the co-acting lip 5 of part 13 The hose nipples C are mountedin the op- V posite ends of the hose sectionsC and are formed wlth screw threaded sections for connection with the angle cocks, as is usual.

Longitudinal contact strips 27, 28, 29 and 30 are mounted in longitudinal grooves in said screw threaded section in position for contact with the contact plates 10,11, 12 and 18 of the angle cook. The rear ends of said plates 27, 28, 29 and 30 are bent upwardly at right angles and rest in recessesjin the described and a switch 51, of any suitable flange of said nipple and are perforated to receive the ends of the circuit wires. Said contact plates are insulated from said nipples, as shown.

Each hose section C is formed with several, preferably five, wires embedded in the material, as rubber, of which it is composed. Said Wires project beyond the ends of the hose sections and four of them at one end are connected with the contact plates 27, 28, 29 and 30, while the fifth extends into a perforation 0 in the flange of the nipple and is electrically connected thereto. wires which are connected, respectively, at one end to the contact plates 27 28, 29 and 30 also project from the opposite end of the hose section and pass through perforations and connect, respectively, with the contact plates 19 and 20 on one side of one part of the hose coupling B and with the corresponding contact plates'on the other side.

A cable 10 containing four wires extends from end to end of each car, the ends of the four wires being respectively connected to the binding posts 15, 16, 17 and 18 on adjacent end of the angle cock on the respec- .tive ends of the train line or air i e on said car. Said train line or pipe is insulated at all points from the hangers and brake mechanism. It will thus be seen that five metallic conductors are established throughout the length of the train, which, with the connection to the. track, or ground, makes six lines or three complete circuits.

In the use of this system a telephone, as 50, of any approved type is installed in the cab of a locomotive and another is installed in a convenient part of each car throughout the train. The telephones are connected in one or the other of theseveral circuits above type, is provided whereby either wire or circuit may be used interchangeably. By thus providing a number of wires or conductors, as SIX 1n the present instance, a considerable number of circuits are available and can be utilized interchangeably and the interruption of the use of the apparatus by one or more circuits becoming broken or inter rupted is thus guardedagainst. Such an apparatus being installed in all the cars and locomotives of a railway system, the making up of any train, or the switching of cars from one train to another, does not in any manner interferewith the use of the system, for, as soon as the air line is connected throughout the train, which must be done as soon as a car is attached to a train, a circuit is complete and the telephone system placed in operative condition.

I coupling which must of necessity be con- The four purpose of the communication is accurately secured and misunderstandings, with the resulting danger and delays, are avoided. I Having thus fully described my said invention, what I claim as new and desire to secure by Letters Patent, is:

1. A telephone signal system for railway trains, comprising a combined electrical and mechanical coupler or joint forming a part of the necessary air-brake line connection between the several componentparts of the train, conductors constituting several circuits through which articulate speech may be had between various parts of the train. connected with terminals in said couplers, telephone apparatus located in the several component parts of the train and connected in said circuits to provide means for said articulate speech, and switches for connecting said telephones in. said several circuits interchangeably, whereby connection may be made between any part of the train and and comprising contact plates connected in said circuits and mounted in the coupling members of the air brake line and contact plates mountedln the angle-cocks, and wlres connecting the sets of contact plates, substantia'lly as set'forth.

3. In a telephone system for railway trains the combination ofa telephone apparatus located in the several component parts of the train, an electric circuit connecting said telephones comprising contact plates with which the wire terminals are connected embedded in insulating material andmounted in recesses in the air brake line coupling members and in the angle-cocks of the air brake line, said contact plates and the coupling members being arranged to contact automatically with the coupling of said air brake line, substantially as set forth.

4. A telephone system for railway trains comprising telephones located in several component parts of the train, several. electrical circuits connecting from endto end In Witness whereof, I have hereunto set of the train, contact plates to Which the cirmy hand and seal at Washington, D. C., this 10 cuits are connected, carried by and brought 16th day of November, A. D. nineteen huninto contact through mechanical coupling dred and eleven.

devices operable With the air brake line EDWARD HAROLD BOUDWIN. [n 8-] coupler, said telephones being connected in- WVitnesses: terchangeably in said several circuits, sub- E. W. BRADFORD, stantially as set forth. FRANK E. RAPP.

Copies of this patent may be obtained for five cents each, by addressing. the Commissioner of Patents,

Washington, I). G. 

